Gun-mounting.



' A. T, DAWSON, G. T. BUCKHAM & E. F. ELLIS.

GUN MOUNTING.

APPLICATION FILED JULY 1, |9|7 Patented Apr. 1, 1919.

m A N d I Z w 5 M 2%.. w W @Z 1 UNITED STATES PATENT OFFICE.

ARTHUR T. IDAIVSON AND GEORGE T. BUCKHAM, WESTMINSTER, LONDON, AND ERNEST F. ELLIS, F PURLEY, ENGLAND.

GUN-MOUNTING.

Specification of Letters Patent.

Patented Apr. 1, 1919.

Application filed July 7, 1917. Serial No. 179,269.

in the county of London, England; Vickers House, Broadway, Westminster, in the county of London, England, and The Wood, Furze Hill, Purley, in the county of Surrey, England, have invented certain new and useful Improvements in or Relating to Gun- Mountings, of which the following is a specification.

This invention relates to naval gun mountings particularly those of the pedestal type.

According to the invention we provide means interposed between the carriage and the mounting or other part that does not move in training, for preventing the gun from being moved laterally at a greater speed than that obtainable by the actuation of the training mechanism, thereby obviating liability of the gun taking charge. The said means preferably comprise a dash pot which is operated by the movements of the gun in training and is of such a character that although training of the gun at the maximum speed under the action of the training mechanism is permitted, as soon as this speed is exceeded as aforesaid the in crease of pressure in the dash pot will cause the movement of the gun to be checked.

In order that the said invention may be clearly understood and readily carried into effect we will describe the same more fully with reference to the accompanying drawings, in which Figure 1 is a front elevation, with a portion thereof in section, showing a gun mounting provided with a constructional form of our improvements.

Fig. 2 is a side elevation of Fig. 1 with a portion thereof in section on the line 1, 1 of Fig. 1.

Fig. 3 is a sectional side elevation showing a portion of a gun mounting provided with another constructional form of our improvements, and

Fig. 1 is a section taken approximately on the line 2, 2 of Fig. 3.

A is the gun and A is the carriage. In both the examples shown the aforesaid dashpot comprises a piston B working in a cylinder B filled with oil or other suitable liquid.

In Figs. 1 and 2 the cylinder B is attached to the gun carriage and is arranged vertically beneath the gun and forward of the gun trunnions. Movement of the piston 1n the cylinder B causes the liquid to be forced from one side to the other of the piston through a passage 6 whose area is controlled by an adjustable plug 6 In order to impart movement to the piston B in trainmg the gun, the pistonrod b is formed with qulck pitch screw threads 0 engaging in a nut- C driven by or formihg part of a pinion C gearing with a horizontal rack C attached to the base of the pedestal. The piston B is prevented from rotating by a key I)" in the cylinder B. A detachable cover a" is provided for preventing grit and other foreign substances from gaining access to the screw threads 0 and the nut C; this cover has been removed in Fig. l.

The flowof the liquid through the passage 6 1s so ad uSted by the plug 6 that if the plston B should attempt to move at a greater speed than that determined by the maximum training speed of the gun under the action of of the trainin mechanism, this movement of the piston wil be checked by the liquid being unable to flow fast enough through the said passage b and :the liability of the gun taking charge as aforesaid is avoided.

In Figs. 3 and 4 the piston rod 6 is connected by a vertical pivot b to a stationary bracket B which is preferably, as.

shown, attached to the under side of the shield roof B. This bracket is stayed by rods 6 6 The pivot b is so arranged that its axis is some distance from the axis of training, which is indicated at a: in Fig. 1. Thus when the gun is being trained the piston B will be moved within the cylinder B. The latter is horizontally arranged on the upper part of the carriage and is connected thereto by a vertical pivot 6 In this construction the assage of the liquid from one side to the ot er of the piston B is controlled by a valve key B x which is constructed to give a similar result to that obtained by the plug 6 as described with reference to Figs. 1 and 2.

In each of the constructions shown the cylinder B is provided with a safety valve B It is to be understood that the dash pot and its associated parts may if desired be arranged otherwise than described above.

Letters iBatent e futhe United States is I 1. In a naval gun mounting;the gpmhim tion of training mechanismfor-shifting the gun a predetermined maximum speed andgfin turd free ii'lovenien't of the 'gun at speeds less than I said predetermined maximum speedbufimo preventmgyement of the guy in excesgofl 10 v v said predeterm ed .maximum speed W 2,9 11; i na-vg l. rm mduntiiigggthe *qmieirrag tion with the gun and its *garriage of traming n eehimisinjfdrishifting the giln 'eg-rr-iage laterally glt' SpeedsliOtze xcegdingi'a deterniin'ed iiiaximi'i-m spee dto train the gumm a hofizontagl plane, nism {for the gu "carriage, -said 'r'etlrding mechanism? fleeing deSi-gned 'fifiO allew iree inbvementof the glin ca rrilamge at speeds less f, fspeed;- carriage.

thmyjaid l pi' e'l eteiniified maigimum but to PIGIXIIiItfiliOVGIHQhjjLof the; gun I in eXQes T def 'sa-idgjpiedetrniined maximum P d I II I I II a, na?ahgfimniopptingthe combination of treifiiiig Iheehediiism foi shifting the m; predetermined maximum! speed and r e; 'ta-rdii'i'gjineqhanism fpr hhefgliiyeaid retardf Copies of this pgtept may bg pbteinegifei' and} aj retarding meehar; 4

I 1,299,1i4q I wingdmeansflcomprising a part carried by the gin 1,3 pela tiyelyi fixed pai h a id. connections. ..bet,\2Vee1 i v;fl1e'g,pa1:fis ;a11oWing free I relative movement thered f at Speeds less than said predetepmined maximum speed, but prevente reta ding mechz nism fofthe gun, said refllngrelative movement of said parts at speeds 111g-:m6Gh2L111Sm; bQ1llg,l6Slgned he gillgysg in exeesg of .said predetermlned maximum-V.

speed. I I 5 4. In w neval gummounting, the com-bination of training mechanism for shifting the gun a predetermined; ma ximum -speed5-- a nd I to the gu i ferimowemenb therewithyfiheothem 0f skiichpai jg-s being; it-e1aAg'i vely fixe'd;- a" liquid in said bylii-ldenite he feirciilated: by the lrelzifi '-tivei-iiioyemeptof {she pispon a-nd emea'ns for r controlling-wile :Gi-IGi-LliktiOIY-Of gaid fluid P to pieventa movemenbof se idegunfat speed-s in exdess--ef said predeterminedwmaximum I speed Willi-=16 jpepniiebii 'g fireei-yimovement 0f i '-t he"gi 1mat 10Wen-Speeds.--,

'mony whe reof weafiix our signa e,

oiie 0f saidfpants being connectedx 

